AC²

AC2 is the GRS system code that is capable of simulating the whole extent of an accident in a nuclear power plant, from the initiating event up to the release of fission products to the environment. The program consists of three main modules: ATHLET, ATHLET-CD and COCOSYS. AC² can be used to simulate large plant accident scenarios as well as experiments in test facilities.

To allow multiphysical or multiscale simulations, AC² has been coupled successfully to various computer codes by means of dedicated coupling interfaces. The following figure depicts the essential interfaces that are realized for AC².